斜拉桥索力监测技术研究与应用

通过对斜拉桥索力监测技术研究成果及工程经验的回顾和总结,研究了目前常用的索力量测方法(即振动频率量测法)的使用范围及带减振器拉索索力量测的缺陷,分析了带橡胶组合减振器拉索的构造特点及力学特性,建立了带橡胶组合减振器拉索的动力学模型,根据能量原理,推导出考虑减振器影响的索力计算公式,并在青岛丹山斜拉桥进行了应用,取得了预期的效果,为同类桥梁的施工控制与运营管理,特别是为带橡胶组合减振器拉索索力监测提供了理论依据与技术保障。

A Study and Application of Monitoring and Measurement Technology for Cable Tensions on Cable-Stayed Bridge

Through reviewing and summarizing to the existing study achievements and project experiences,the common method used to measure cable force(method of measuring vibration frequency) is studied,its adaptive limits and the shortage in measuring the force in cables with shock absorber are pointed out.The structural characters and mechanics properties of cable with shock absorber are also analyzed and the dynamics model is set up.According to the energy principle,the calculation method considering with the effect of shock absorber is carried out,and is applied to Danshan cable-stayed bridge in Qingdao City,and the expected results are obtained,which provides theoretic basis and technological preservation to the construction control and operation management of same type bridge especially to force monitoring in the cables with shock absorber.